Comment.

llvm-svn: 92850
2010-01-06 19:43:21 +00:00 · 2010-01-06 19:43:21 +00:00 · 746012a6c1
parent 166a4e6caa
commit 746012a6c1
1 changed files with 3 additions and 0 deletions
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
@ -438,6 +438,9 @@ void SelectionDAGISel::SelectBasicBlock(BasicBlock *LLVMBB,
  SDB->clear();
 }

+/// ShrinkDemandedOps - A late transformation pass that shrink expressions
+/// using TargetLowering::TargetLoweringOpt::ShrinkDemandedOp. It converts
+/// x+y to (VT)((SmallVT)x+(SmallVT)y) if the casts are free.
 void SelectionDAGISel::ShrinkDemandedOps() {
  SmallVector<SDNode*, 128> Worklist;